require 'rvg/rvg'

Magick::RVG.dpi = 90

rvg = Magick::RVG.new(12.cm, 4.cm).viewbox(0, 0, 1200, 400) do |canvas|
  canvas.background_fill = 'white'
  canvas.desc = 'Example line01 - lines expressed in user coordinates'

  # Show outline of canvas using the 'rect' method
  canvas.rect(1195, 395, 1, 1).styles(fill: 'none', stroke: 'blue', stroke_width: 2)

  canvas.g.styles(stroke: 'green') do |grp|
    grp.line(100, 300, 300, 100).styles(stroke_width: 5)
    grp.line(300, 300, 500, 100).styles(stroke_width: 10)
    grp.line(500, 300, 700, 100).styles(stroke_width: 15)
    grp.line(700, 300, 900, 100).styles(stroke_width: 20)
    grp.line(900, 300, 1100, 100).styles(stroke_width: 25)
  end
end

rvg.draw.write('line01.gif')
